Q. I need some guidance in getting a spray gun which will allow me to paint
the inside of a cylider. The dia of the cylinder is about 5 inches and the length
is 22 inches. Obviously the gravity fed HVLP is not able to acess the areas
inside this cylinder/tube. Can I get a gun which will give me access to these
non-reachable areas?

Thanks for your email. Yes, you can get a spray gun extension that can be attached
to the end of your spray gun. You would need to pick the length of the extension
to suite the application; in this case either 24" or 36" or whatever
is available. It really doesn't matter whether you use a gravity of pressure
feed gun, provided that you have sufficient fluid pressure to move the coating
to the orifice, which will be at the end of the extension tube.

I entered "spray gun extension" into Google and came up with at least
one supplier: